| 摘要 |
PURPOSE:To prevent a danger due to gas leakage by airtightly storing pipes feeding and discharging a combustible gas such as hydrogen gas from a cell stack in protective pipes sealed with an inactive gas such as nitrogen gas. CONSTITUTION:A hydrogen gas feed pipe 11, a discharge pipe 12, an air feed pipe 13, and a discharge pipe 14 are connected respectively to the manifold 10 of a cell stack 9 laminated with multiple unit cells, a cooling water feed pipe 15 and a discharge pipe 16 are connected, and they are stored in a tank 21 sealed with an inactive gas such as nitrogen gas to form a fuel cell. In this case, the hydrogen gas feed pipe 11 and discharge pipe 12 are stored respectively in separate protective pipes 22, and the protective pipes 22 are constituted so that the nitrogen gas in the tank 21 flows through them. Accordingly, a danger that gas leakage occurs on the feed/discharge pipes of hydrogen gas and the hydrogen is mixed and reacted with oxygen in the atmosphere is eliminated, and the reliability can be improved. |
